For purchasing managers and aerospace engineers using Boeing, Airbus, or GE design drawings, substitution compliance is a critical pain point. When a design specifies Inconel 718 (UNS N07718), but the supply chain provides GH4169, a series of key questions arise:
Does the Chinese-made GH4169 meet the chemical purity requirements for flight safety components?
Are its mechanical properties identical after aging heat treatment?
Can this material pass rigorous international aerospace quality audits?
From a technical perspective, the answer is yes. GH4169 is a Chinese-made material directly equivalent to the globally used UNS N07718. At Gnee Alloy, we are committed to bridging the compliance gap, providing aerospace-grade materials that are globally interchangeable with Western brand high-temperature alloys.
Click to apply for an equivalent compliance certificate for GH4169
Comparison of GH4169 and Inconel 718 in global equivalent materials and aerospace standards
Comparison of GH4169 and Inconel 718 in global equivalent materials and aerospace standards
GH4169 is a grade of precipitation-hardening nickel-based superalloy specified in the Chinese national standard (GB/T), with chemical composition and mechanical properties equivalent to Inconel 718 (UNS N07718). Both materials are widely used in the aerospace field, such as in gas turbine engines and high-temperature bolts, because they maintain high strength, fatigue resistance, and creep resistance even at operating temperatures up to 650°C (1200°F).
What are the disadvantages of Inconel 718?
Disadvantages of Inconel 718 and its alternatives
While Inconel 718 boasts excellent mechanical and corrosion resistance properties, it also has some drawbacks: High cost: Due to its complex manufacturing process, Inconel 718 is expensive. Difficult to process: Its high hardness makes material removal difficult and accelerates tool wear.
1. Comparison of Equivalent Grades for GH4169
GH4169 is widely used in the Chinese market, but in global procurement, it is usually listed together with international equivalent grades:
China: GH4169 (GH169)
USA: Inconel 718, UNS N07718, AMS 5596 (plate), AMS 5662/5663/5664 (bar)
Germany (DIN/EN): NiCr19NbMo, W-Nr 2.4668
France: NC19FeNb
Click to view GH4169 and Inconel 718 global standards
2. GH4169 Global Standard Table
To simplify your international procurement, refer to our comprehensive standards cross-reference chart.
| Product Form | USA (AMS/ASTM) | China (GB/T) | Europe (W.Nr. / DIN) | UK (BS) |
| Bars & Forgings | AMS 5662 / 5663 | GB/T 14992 | 2.4668 / NiCr19NbMo | HR 202 / NA 51 |
| Sheets & Plates | AMS 5596 / 5597 | GB/T 14992 | 2.4668 / NiCr19NbMo | HR 202 / NA 51 |
| Seamless Pipes | ASTM B637 | GB/T 15062 | NiCr19NbMo | HR 202 / NA 51 |
| General Spec | UNS N07718 | GH4169 | Alloy 718 | Inconel 718 |
3. GH4169(inconel 718)Chemical Composition Comparison
| Element | GH4169 / Inconel 718 (wt%) | Significance |
|---|---|---|
| Nickel (Ni) | 50.0 – 55.0 | Matrix and stability |
| Chromium (Cr) | 17.0 – 21.0 | Oxidation / corrosion resistance |
| Iron (Fe) | Balance (~18 – 20) | Cost-effective matrix element |
| Niobium (Nb) | 4.75 – 5.50 | Primary γ″ (gamma double prime) strengthening |
| Molybdenum (Mo) | 2.80 – 3.30 | Solid solution strengthening |
| Titanium (Ti) | 0.65 – 1.15 | γ′ (gamma prime) formation |
| Aluminum (Al) | 0.20 – 0.80 | γ′ (gamma prime) formation |
Click to download the GH4169 alloy PDF file now
4. Mechanical properties of GH41696 at 50°C (1200°F)
| Mechanical Performance at 650°C (1200°F) | Value | Standard |
|---|---|---|
| Yield Strength (0.2% Offset) | ≥ 850 MPa | Matches AMS 5662 |
| Tensile Strength | ≥ 1000 MPa | Matches AMS 5662 |
| Stress Rupture Life | ≥ 100 Hours | Verified at 650°C / 690 MPa |
Why choose Gnee Alloy, a Tier 1 aerospace supplier?
✅️AS9100 Certified Factory: Our quality management system meets the global gold standard for aviation manufacturing.
✅️Direct Factory Pricing: Save up to 20% compared to Western-branded materials while securing the same Structural Integrity.
✅️MTC 3.1 Traceability: Full heat number tracking from VIM to final product included with every shipment.
✅️Fast Global Shipping: We maintain a large Wholesale Inventory of solution-treated rods and sheets ready for immediate export.
Gnee Alloy GH4169 certificate
Contact us now to get the latest export price for GH4169 in 2026
FAQ
Q1: Is GH4169 fully accepted as an equivalent to UNS N07718 for Nuclear projects?
A: Yes. Our GH4169 meets the chemical and mechanical thresholds of ASME BPVC Section III, making it a reliable and cost-effective choice for nuclear reactor internals and high-strength springs.
Q2: Can I weld GH4169 parts directly to existing Inconel 718 assemblies?
A: Absolutely. Since the metallurgical base is identical, they share the same weldability and response to double-aging heat treatments.
Q3: Does your material meet the grain size requirements of AMS 5662?
A: Yes. Through controlled forging ratios and precise solution annealing, we guarantee a grain size of ASTM E112 Level 8 or finer, ensuring maximum fatigue life.
Q4: Do you provide documentation in English for international audits?
A: Yes. All our Mill Test Certificates (MTC) and technical datasheets are provided in professional English, ready for your quality control team's immediate review.